static extern uint AcquireCredentialsHandle(
string pszPrincipal, //SEC_CHAR*
string pszPackage, //SEC_CHAR* //"Kerberos","NTLM","Negotiative"
int fCredentialUse,
IntPtr PAuthenticationID, //_LUID AuthenticationID,//pvLogonID, //PLUID
IntPtr pAuthData, //PVOID
int pGetKeyFn, //SEC_GET_KEY_FN
IntPtr pvGetKeyArgument, //PVOID
ref SECURITY_HANDLE phCredential, //SecHandle //PCtxtHandle ref
ref SECURITY_INTEGER ptsExpiry); //PTimeStamp //TimeStamp ref
static extern uint InitializeSecurityContext(
ref SECURITY_HANDLE phCredential, //PCredHandle
ref SECURITY_HANDLE phContext, //PCtxtHandle
string pszTargetName,
int fContextReq,
int Reserved1,
int TargetDataRep,
ref SecBufferDesc SecBufferDesc, //PSecBufferDesc SecBufferDesc
int Reserved2,
out SECURITY_HANDLE phNewContext, //PCtxtHandle
out SecBufferDesc pOutput, //PSecBufferDesc SecBufferDesc
out uint pfContextAttr, //managed ulong == 64 bits!!!
out SECURITY_INTEGER ptsExpiry); //PTimeStamp
public void EncryptMessage(byte[] message, out byte[] encryptedBuffer)
{
encryptedBuffer = null;
SECURITY_HANDLE EncryptionContext = _hClientContext;
SecPkgContext_Sizes ContextSizes;
if (QueryContextAttributes(ref EncryptionContext,
SECPKG_ATTR_SIZES, out ContextSizes) != SEC_E_OK)
{
throw new Exception("QueryContextAttribute() failed!!!");
}
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[]
{
new MultipleSecBufferHelper(new byte[ContextSizes.cbSecurityTrailer],
SecBufferType.SECBUFFER_TOKEN),
new MultipleSecBufferHelper(message, SecBufferType.SECBUFFER_DATA),
new MultipleSecBufferHelper(new byte[ContextSizes.cbBlockSize],
SecBufferType.SECBUFFER_PADDING)
};
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
if (EncryptMessage(ref EncryptionContext,
SECQOP_WRAP_NO_ENCRYPT, ref DescBuffer, 0) != SEC_E_OK)
{
throw new Exception("EncryptMessage() failed!!!");
}
encryptedBuffer = DescBuffer.GetSecBufferByteArray();
}
finally
{
DescBuffer.Dispose();
}
}
public void DecryptMessage(int messageLength, byte[] encryptedBuffer, out byte[] decryptedBuffer)
{
decryptedBuffer = null;
SECURITY_HANDLE DecryptionContext = _hClientContext;
byte[] EncryptedMessage = new byte[messageLength];
Array.Copy(encryptedBuffer, 0, EncryptedMessage, 0, messageLength);
int SecurityTrailerLength = encryptedBuffer.Length - messageLength;
byte[] SecurityTrailer = new byte[SecurityTrailerLength];
Array.Copy(encryptedBuffer, messageLength, SecurityTrailer, 0, SecurityTrailerLength);
MultipleSecBufferHelper[] ThisSecHelper = new MultipleSecBufferHelper[]
{
new MultipleSecBufferHelper(EncryptedMessage, SecBufferType.SECBUFFER_DATA),
new MultipleSecBufferHelper(SecurityTrailer, SecBufferType.SECBUFFER_STREAM)
};
SecBufferDesc DescBuffer = new SecBufferDesc(ThisSecHelper);
try
{
uint EncryptionQuality;
if (DecryptMessage(ref DecryptionContext, ref DescBuffer, 0, out EncryptionQuality) != SEC_E_OK)
{
throw new Exception("DecryptMessage() failed!!!");
}
decryptedBuffer = new byte[messageLength];
Array.Copy(DescBuffer.GetSecBufferByteArray(), 0, decryptedBuffer, 0, messageLength);
}
finally
{
DescBuffer.Dispose();
}
}
public static extern int VerifySignature(ref SECURITY_HANDLE phContext, // Context to use
ref SecBufferDesc pMessage, // Message to sign
uint MessageSeqNo, // Message Sequence Num.
out uint pfQOP); // Quality of Protection
public static extern int MakeSignature(ref SECURITY_HANDLE phContext, // Context to use
uint fQOP, // Quality of Protection
ref SecBufferDesc pMessage, // Message to sign
uint MessageSeqNo); // Message Sequence Num.
public static extern int DecryptMessage(ref SECURITY_HANDLE phContext,
ref SecBufferDesc pMessage,
uint MessageSeqNo,
out uint pfQOP);
public static extern int EncryptMessage(ref SECURITY_HANDLE phContext,
uint fQOP, //managed ulong == 64 bits!!!
ref SecBufferDesc pMessage,
uint MessageSeqNo); //managed ulong == 64 bits!!!
public static extern int QueryContextAttributes(ref SECURITY_HANDLE phContext,
uint ulAttribute,
out SecPkgContext_Sizes pContextAttributes);
public static extern int ImpersonateSecurityContext(ref SECURITY_HANDLE phContext);